The tenor saxophone is a medium-sized member of the saxophone family, a group of instruments invented by Adolphe Sax in the 1840s. The tenor, with the alto, are the two most common types of saxophones. The tenor is pitched in the key of B♭, and written as a transposing instrument in the treble clef, sounding an octave and a major second lower than the written pitch. Modern tenor saxophones which have a high F# key have a range from A♭2 to E5 (concert) and are therefore pitched one octave below the soprano saxophone. People who play the tenor saxophone are known as "tenor saxophonists", or more commonly "tenor sax players".

The tenor saxophone uses a larger mouthpiece, reed, and ligature than the alto and soprano saxophones. Visually, it is easily distinguished from these instruments by the bend in its neck, or its crook, near the mouthpiece.

The tenor saxophone is used in many different types of ensembles, including concert bands, big band jazz ensembles, small jazz ensembles, and marching bands. It is occasionally included in pieces written for symphony orchestra and for chamber ensembles; three examples of this are Ravel's Boléro, Prokofiev's suite from Lieutenant Kijé,and Webern's Quartet for violin, clarinet, tenor saxophone, and piano. In concert bands, the tenor plays mostly a supporting role, sometimes sharing parts with the euphonium, horn and trombone. In jazz ensembles, the tenor plays a more prominent role, often sharing parts or harmonies with the alto saxophone.

Benjamin Francis Webster (March 27, 1909 – September 20, 1973), a.k.a. "The Brute" or "Frog," was an influential American jazz tenor saxophonist. Webster, born in Kansas City, Missouri, was considered one of the three most important "swing tenors" along with Coleman Hawkins and Lester Young. Known affectionately as "The Brute", he had a tough, raspy, and brutal tone on stomps (with his own distinctive growls), yet on ballads he played with warmth and sentiment. Stylistically he was indebted to alto star Johnny Hodges, who, he said, taught him to play his instrument.

Webster learned to play piano and violin at an early age, before learning to play the saxophone, although he did return to the piano from time to time, even recording on the instrument occasionally. Once Budd Johnson showed him some basics on the saxophone, Webster began to play that instrument in the Young Family Band (which at the time included Lester Young). Kansas City at this point was a melting pot from which emerged some of the biggest names in 1930s jazz, and Webster joined Bennie Moten's legendary 1932 band that included Count Basie, Oran Page and Walter Page. This era has been recreated in Robert Altman's film Kansas City.

Katheryn Elizabeth Hudson (born October 25, 1984), known by her stage name Katy Perry, is an American singer, songwriter and actress. Perry grew up with gospel music, and during her first year of high school she pursued a music career as Katy Hudson, releasing her first studio album called Katy Hudson which failed to chart. She recorded a solo album later, which was never released. After signing with Capitol Music Group in 2007, her fourth record label in seven years, she adopted the stage name Katy Perry.

She first gained recognition with the release of her first mainstream album, One of the Boys in 2008, which spawned three Billboard Hot 100 top-ten songs—"I Kissed A Girl", "Hot n Cold" and "Waking Up In Vegas". Perry supported the album with her Hello Katy Tour. In 2010, her third studio album, Teenage Dream (2010), which topped the Billboard 200 chart, and spawned five number one singles—"California Gurls", "Teenage Dream", "Firework", "E.T." and "Last Friday Night (T.G.I.F.)"—Teenage Dream was the only album (after Michael Jackson's Bad)—to do so, and the first female in history to achieve this milestone. She embarked on the California Dreams Tour, which grossed nearly $60 million worldwide. Perry re-released the album under the name of Teenage Dream: The Complete Confection on March 26, 2012, and the re-release has already spawned the number-one single "Part of Me".

Thomas DeCarlo Callaway (born May 30, 1974), better known by his stage name Cee Lo Green, is an American singer-songwriter, rapper, record producer and actor. Originally came to prominence as a member of the southern hip hop group Goodie Mob, later launching a critically acclaimed solo career and forming Gnarls Barkley with DJ Danger Mouse.

Internationally, Cee Lo is best known for his hip hop work, his most popular was Gnarls Barkley's 2006 worldwide hit "Crazy", which reached number one in various singles charts worldwide, including the UK. In the United States, "Crazy" reached number two on the Billboard Hot 100. Parent album St. Elsewhere was also a hit, reaching number one on the UK Albums Chart and number four on the US Billboard 200 album charts. Gnarls Barkley's second album, The Odd Couple (2008), was less successful and missed the top ten in both the UK and U.S., where it charted at number 12 in the U.S. and 18 in the UK.

In 2010, Cee Lo took a break from recording with Gnarls Barkley and released the single "F**k You!" on August 19 as a solo recording artist. The song was an instant hit, with the radio-edit version "Forget You" reaching the top spot in the UK and the Netherlands and charted at number two on the U.S. Billboard Hot 100. The parent album, The Lady Killer (2010) saw similar success, peaking within the top five of the UK Albums Chart and debuting within the top ten on the Billboard 200 album charts, and received a Gold certification from the BPI in the UK shortly after its release. His second single "It's OK" was a hit in Europe and the third single, "Bright Lights Bigger City" has also seen similar charting success. Cee Lo is also currently a vocal coach on the NBC reality talent show The Voice with Adam Levine, Christina Aguilera, and Blake Shelton.